Explainer: Preventing User Dictionary Leaks via ::spelling-error and ::grammar-error CSS Pseudo-Elements

[arichiv]

We want to prevent websites from extracting information about a user’s dictionary using CSS spelling/grammar hint highlights. This is currently possible by making a text field with a repeated (misspelled) word autofocus and monitoring rendering performance to notice when highlighting occurs.

https://explainers-by-googlers.github.io/user-dictionary-leaks/